QUESTIONS CARRY TWO MARKS EACH.
A loaded semi-finite flat plate is having an elliptical hole(A/B= 2) in the middle as shown in figure. The stress concentration factor at points either x or y will be…………….
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Solution
QUESTIONS CARRY TWO MARKS EACH.
A rod of uniform diameter is suspended from one of its ends in vertical plane.The mass of the rod is m and length l, the natural frequency of this rod is Hz for small amplitude is :
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Solution
QUESTIONS CARRY TWO MARKS EACH.
The figure shows the schematic diagram of an I.C engine producing a torque T = 40 N-m at the given instant. The coulomb friction coefficient between the cylinder and the piston is 0.08. If the mass of the piston is 0.5 kg and the crank radius is 0.1 m, the coulomb friction force occuring at the piston-cylinder interface will be …………….
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Solution
One of the index plates of a milling machine dividing head has the following hole circles,15, 16, 17, 18, 19, 20 A gear wheel of 34 teeth has to be milled by simple indexing method. To machine each tooth, the index crank has to be rotated through :
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Solution
QUESTIONS CARRY TWO MARKS EACH.
In orthogonal cutting operation, the cutting force = 900N,the thrust force= 600 N and the chip shear angle in 30°. Then the chip shear force will be …………….
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Solution
QUESTIONS CARRY TWO MARKS EACH.
Match List-I with List-II.
LIST-I LIST-II
A.Specific speed of 1.N√QH3/4
turbine
B.Specific speed of 2.N√PH5/4
pump
C.Specific speed of 3.50 – 250
pelton wheel
D.Specific speed of 4.10 – 50
Francis turbine
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Solution
QUESTIONS CARRY TWO MARKS EACH.
The stream function ψ= x3– y3 is observed for a two-dimensional flow field. The magnitude of velocity at point(1,-1)will be …………….
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Solution
QUESTIONS CARRY TWO MARKS EACH.
Heat transfer by radiation between two grey bodies of emissivity is proportional to (notations have their usual meaning)
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Solution
QUESTIONS CARRY TWO MARKS EACH.
A cylinder made of metal of conductivity 40 W/m-K is to be insulated with a material of conductivity 0.1 W/m-K.If the convective heat transfer coefficient with the ambient atmosphere is 5 W/m2K, the critical radius of insulation will be …………….
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Solution
QUESTIONS CARRY TWO MARKS EACH.
A converging-diverging nozzle is connected to a gas pipeline. At the inlet of the nozzle (converging section)the Mach number is 2. It is observed that there is a shock in the diverging section. What is the value of Mach number at the throat ?
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Solution
The value of Mach number at throat will be equal to 1.